Carbureter.



Ni. BECK` CARBURETER. APPLICATION FILED SEPT. 22, 1916.

Patented Apr. 3Q, 1918.

l Mmmm MICHAEL BlElCK, 0F MINNEAPOLIS, MINNESOTA.

CARBURETER.

Laemmli.

Specification of Letters Patent.

Patented npr. so, reis.

@riginal application led May 11, 1916, Serial No. 96,8181 Dividedandthis application led September 22,

p 1916. Serial No. 121,596.

To all evhom t may concern:

Be it known that I, MICHAEL BECK, a citizen of United/States, residingat Minneapolis, in' the county of Hennepin and State o Minnesota, haveinvented certain new and usefulv Improvements in Carbureters;

and Ido hereby declare the following to be a full, clear, and exactdescription of the 1nvention, such as will enable others skilled in theart to which it appertains to make .and use the same.

My invention has for its object to'provlde an extrmely simple 'andhighly eclent carbureter, primarily for internal combustion engines; andis a division of my eo-pendingl application, entitled Vapor generatorsand views.

Referring to the drawings,

Figure 1 is a view of the improvedcarbureter in central verticalsection; and

Fig. 2 is a fragmentary detail view in section taken principally on theirregular line 2 2 of Fig. 1.

rlhe numeral 1 indicates a casing having a screw-threaded extension 2adapted to be screwed into the fuel intake manifold of an internalcombustion engine, not shown. Formed 1n the casing 1, 1s a mlxingvchamber 3, which has communication'with the said Vfuel intake manifoldthrough the extension 2. In the bottom of the casing 1, is formed agaseous fuel chamber 4, the top or crown' of whichv extends into themixing chamber 3. The bottom'of the fuel chamber 4 is open and hasscrewed ttherein the delivery end of a gaseous fuel conveying conduit5,*-

which leads from any suitable source of supply. In the top of the fuelchamber 4, is a port 6 and in the top of the casing 1, is a relativelylarge yannular opening 7 axially alined with said "port:

A cap 8 is screwed into the .opening l is provided with a hub -9 that isco-axial therewith. The lower end of the cap 8 has upwardly convergingsurfaces' to' aHord a 11, 1916, under S. N.'

valve seat 10. Within the top of the cap 9, is vformed a plurality ofcircumferentially spaced air intake ports 11. The walls `of the port 6upwardlyconverge to afford a seat for a fuel intake valve 12', normallyclosing said port and arranged to open into the fuel chamber 4. The airintake ports 11 are normally closed by a`n air intake valve 13, mountedonthe seat 10 and having a tubular stem 14 mounted in the hub 9 andextending thereabo've.. An adjustable abutment 15, in the form of athumb-nut, has screw-threaded engagement with the upper end of the valvestem 14. A coiled spr-1n 16 is compressed between the cap 8l an abutment15 and yieldingly holds the valve 13 closed.

The fuel intake valve 12 is provided with Va tubular stem 17, which istelescoped through the valve stem 14 and has on its upper end anadjustable abutment 18-in the form of a thumb-nut having screw-threadedengagement therewith. A pair of opposing coiled springs 19 andv 20 arecompressed, re-

Us ect'ively, between the valves 12 and 13 and abutments 15 and 18.These springs 19 and' 20 are counterpoised under substantially the sametension, with a slight eX- cess of tension in the spring 20. The stemsof the valves 12 and 13 are held against rotary movement, the one withinthe 'other v and in the hub 9 by a screw pin 21 having screw-threadedengagement with said hub. The inner end of this pin 21 extends through aslot 22 in the valve stem 14 and into a groove 23 formed in the valvestem 17. It is important to note that the screw pin 21, whileholdingthe' valve stems against rotary movement, permits independentendwise movements thereof.

Under the suction stroke of the engine, the air intake .valve 13 willopen first, on

account of its excess area, over the valve 12,

and compress the spring 16. The spring 20, owing to its excess oftensionover the spring 19, will hold the Valve 12 closed, at the time the valve13 starts to open, but after said valve 13 has moved a slight distanceand compressed the spring 19, said spring 19 and the spring 20 willneutralize and the .valve 12 will be o cned by the fur-- ther movementof the va ve 13. vBy thus slightly opening the valve 13, before thevalve l2 starts to open, insures a good sup-V ply of air to the mixingchamber with which the fuel charge commingles with the opening ofthevalve 12.

During the closing lmovement of the valves 12 and 13, the valve 12- willfirst be seated and then the valve 13. This final closing movement ofthe valve 13 will place the spring under its excess counterpoisedtension, which insures the proper seating of both of the valves. Thetension i of the springs 16 and 20 may be varied by the adjustment ofthe abutments 15 and 18.v By adjusting the abutment 18to place thespring 20 under a greatertension, will automatically decrease thetension on the spring 19 and vice versa.

In starting the engine when the same is i' cold, gasolene. or otherlight hydrocarbon liquid fuel is delivered directly into the vmixingchamber'3, through a pipe or conduit 24 leading from a suitable sourceof supply. This pipe 24 extends horizontally through the casing 1intothe fuel chamber 4 and its delivery end portion extends verticallyupward into a socket 25 formed in -the bottom of the fuel intake valve12.

Said socket25 is of suoli depth as to permit the valve 12 to slide onthe pipe 24, during its opening and closing movements. The axial openingin the stem 17 of the valve 12 opens into the socket 25 and hascommunication with the mixing chamber 3, through oblique radial ports26'formed in said valve 12.

The ports 26 maybe opened and closed, at will, by a needle valve 27, thestem of which is mounted in the tubular stem 17 of the valve'12 and hasscrew-threadedengagement therewith at .its upper end portion. A- knurledfinger piece 28 is secured to the upper end of the valve stem 27 by.

ber 4, a relatively large hole is made in the casing 1 and this hole isclosed by a screw plug 30, through which the pipe 24 extends.

What I claim is 1. In a carbureter, thecombination with a casing havingan air intake port and a fuel intake-port, of an air intake valve and afuel intake valve coperating respectively with said ports andnormallyclosing the same, a' spring yieldingly holding the air intake valveclosed, and two opposing springs connecting the fuel intake valve tolthe air intake valve, one cf said-two springs having a slight excess oftension over the other thereof, the initial opening movement of the airintake valve neutralizing said two springs and causing the fuel intakevalve to move with the air intake valve.

'2. In a carbureter, the combination with a casing having an air intakeport and a fuel intake port, of an air intake valve and a fuel intakevalve coperating respectively with said ports and normally closing thesame, said two valves havmgstems telel-scoped, the one through theother, abutments'on the stems of said valves, a spring compressedbetween a relatively fixed support and the abutment on the outer valvestem, and a spring compressed between said two abutments.

3. In a carbureter, the combination with a casing having an air intakeport and a fuel intake port, of an air intake valve and a fuel intakevalve coperating respectively with said ports and normally closing thesame, said two valves having stems telescoped, the one through theother, adjustable abutments on the stems of said valves,

a spring compressed between a relatively fixed support and the abutmenton the outer valve stem, and a springcompressed between said twoabutments.

4. In a earbureter, the combination willi a casing having an air intakeportI and a fuel intake port, of an air intake valve and a fuel intakevalve coperating respectively with said ports and normally closing` thesame, said two valves having stems teleseoped, the one through theother, abul'ments on the stems of Asaid valves, a spring compressedbetween a relatively fixed support and the abutment on the outer valvestem, a spring compressed between said two abul'ments, and a springcompressed between said two valves.

5. In a carbureter, the combination with a casing having an air intakeport and a fuel lintake port, of an air intake valve and a fuel intakevalve coperating respectively with said ports and normally closing thesame, said two valves having stems telescoped, the one through theother,adjuslable abutments on the stems of said valves, a springcompressed between a relatively fixed support and the abutment on theouter valve stem, a spring`compressed between said two abutments, andcommon means for holding the valve stems against rotation.

G. In a carbureter, the combination with a. casing having an air intakeport and a fuel intake'port, of an air intake valve and a fuel intakevalve coperating respectively with said ports and normally closing thesame, said two valves having stems telescoped, the one through theother, abutments on the stems of said valves, a pair of opposingsprings, the one compressed between said two abutments and the othercompressed bevine-1,111.1

i tween said two valves, and a spring compressed between a relativelyfixed supportl `intake valve, the former having` a greater' area thanthe latter, said valves coperating respectively with said portsv andnormally closing tlie same, said two valves vhaving stems telescoped,the one through the other, abutments on the stems of said valves, a pairof opposing springs, the one lCompressed between said two abutinents andthe other compressed between -said two valves the spring compressedbetween said, two abutinents having a slight excess of tension over thespring compressed between said twoi valves, and a spring compressedbetween -a relatively fixed support and'the abutment onthebuter valvestein and tending tohold said two valves closed. i

S. In a carbureter, the combination with a easing having an air intakeport and a fuel intake port, of an aii'intake valve and a fuel intakevalve, the former having a greater area than the latter, said valvescooperating respectively withsaid ports and normally closing the same,said two valves vhaving stems telescoped, the latter through the former,abutnients on the stems of said valves,

a pair of opposing springs, the one compressed between said twoabutments and the other betweensaid two valves, the spring compressedbetween said two abiitinents having a slight excess `ofiv tension overthe spring compressed between said two valvesand a -the stem of saidvalve, a spring compressed between said cap and abutment and tending tohold said valve closed, a fuel intake valve normally closing vsaid fuelintake port and having a stem telescoped through the stein of the airintake valve, an abutment on the stein of the fuel intake valve, and apair of opposing springs, the one compressedr b etween said twoabutments and the other between said two valves, the spring compressedbetween said two abutnients having a Slight excess of tension over thespring compressed between said two valves.

10. In a carbureter, the combination with a casing having a fuel intakeport, of a fuel intake valve coperating with said port, an auxiliaryfuel supply conduit'opening into said casing through said valve, and avalve spring compressed between a relatively fixed support and theabutment on theouter valve stem and tending vto hold said two valvesclosed.

9. In a carbureter, thecornbination with a casing having a fuel intakeport and a rcap normally closing-and opening in -said veasing and havinga, hub :and an air intake port, of

an air valve normally closing'said air port and having a tubular stemextending through the liiib of `said cap, anabu-tnient on carried bythefuel intake valve for controlling said auxiliary fuel supply conduit inall positions of said fuel intake valve.

11. In a carbureter, the combination with a `casing having a fuel intakeport, of a fuel intake valve coperating with said port, an auxiliaryfuel supply pipe with the delivery end of .which said valve hastelescopical movement, a port in said valve connecting the auxiliaryfuel supply pipe with the interior of said casing, and a valve forcontrolling. the port in said fuel intake valve in all positions of saidfuel intake valve.

12. Ina carbureter, the combination with a casing having a fuel intakeport, of a fuel intake valve coperating with said port and having atubular stem, an auxiliary fuel supply pipe with the delivery end ofwhich said valve has telescopical engagement, a ports/in said valveconnecting the auxiliary fuel supply pipe with the interior of saidcasing, and a needle valve in the stem of said fuel intake valve forcontrolling the port therein in all positions-of said fuel intake valve.

In testimony whereof I aiix my signature in presence of two witnesses. o

' MICHAEL BECK. Witnesses: CLARA DEMAREST,

IIARRY D. KILGORE.

